紫云英还田对双季稻产量及稳定性的影响

生态学杂志

紫云英还田对双季稻产量及稳定性的影响

唐杉¹,王允青^1**,赵决建²,张智³,吴立蒙³,曹卫东^4

(¹安徽省农业科学院土壤肥料研究所，安徽养分循环与资源环境省级实验室，合肥 230031； ²安徽省桐城市农技中心，安徽桐城 231400； ³安徽省桐城市吕亭镇农技站，安徽桐城 231402； ^4中国农业科学院农业资源与农业区划研究所，农业部植物营养与肥料重点实验室, 北京 100081)

出版日期:2015-11-10 发布日期:2015-11-10

Effects of milk vetch application on double cropping rice yield and yield stability.

TANG Shan¹, WANG Yun-qing^1**, ZHAO Jue-jian², ZHANG Zhi³, WU Li-meng³, CAO Wei-dong^4

(¹Soil and Fertilizer Institute, Anhui Academy of Agricultural Sciences, Laboratory of Nutrient Cycling, Resources and Environment of Anhui, Hefei 230031, China; ²Center of Agricultural Extension of Tongcheng City in Anhui Province, Tongcheng, 231400, Anhui, China; ³Agricultural Technique Station of Luting Township, Tongcheng, 231402, Anhui, China; ⁴Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Ministry of Agriculture Key Laboratory of Plant Nutrition and Fertilizer, Beijing 100081, China）

Online:2015-11-10 Published:2015-11-10

摘要/Abstract

摘要：

根据多年定位试验(2008—2013年)，研究了紫云英还田对作物产量及稳定性的影响，讨论了双季稻产量与土壤养分变化的相关性。结果表明：多年定位试验中，早稻紫云英还田可以显著提高早稻产量，同时对晚稻产量的提高也存在显著后效；早稻紫云英还田减小了双季稻产量年度间变异系数，使水稻产量更为稳定；多年水稻产量随着土壤肥力提高而提高，早稻紫云英还田对土壤的培肥是水稻产量增长、产量稳定性提高的主要影响因素；等量氮素投入情况下，紫云英氮对土壤全氮、有机质的提升作用显著高于化肥氮；可见紫云英作为绿肥，同时兼有提供当季速效养分效果和培肥土壤的长期作用；紫云英作为绿肥还田不仅提高了水稻产量，同时通过提升稻田土壤肥力，进而使稻田生产力更加稳定。

关键词: 氮肥利用率, 双氰胺, 减氮, 秸秆还田

Abstract: Based on the double cropping rice yield and soil nutrient situation in a sitespecific experiment during 2008 and 2013, we studied the effect of yearly milk vetch application on rice yield and its stability, and discussed the correlation between rice yield with soil nutrient variation. The results showed that milk vetch application significantly improved both early and late rice yields. Milk vetch application to early rice reduced the interannual variation of double cropping rice yield, and thus made the overall rice yield more stable. Increased soil fertility by milk vetch application was the decisive factor for increment of overall rice yield and yield stability. Further analysis showed that N released from milk vetch improved soil organic matter and total nitrogen more significantly than commensurate application of chemical fertilizer N. The application of milk vetch not only improved the productivity of paddy soil, but also made the productivity of paddy soil ecosystem more stable by raising its soil fertility. We conclude that using milk vetch as green manure can provide available nutrients in current season and improve soil fertility over a long period of time.

Key words: straw returning, N use efficiency, DCD, reducing N fertilizer

唐杉1,王允青1**,赵决建2,张智3,吴立蒙3,曹卫东4. 紫云英还田对双季稻产量及稳定性的影响[J]. 生态学杂志.

TANG Shan1, WANG Yun-qing1**, ZHAO Jue-jian2, ZHANG Zhi3, WU Li-meng3, CAO Wei-dong4. Effects of milk vetch application on double cropping rice yield and yield stability.[J]. cje.

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